Evaporating apparatus.



B. E. TAYLOR.

EVAPORATING APPARATUS.

APPLICATION FILED MAY 10. 1918.

p 2 W6 W m n w mm W W T T- m w a m J /w m r m a FA u u A" I IN Q hu h 5 6 a/ a m 7 r 1 I.:,

B. E. TAYLOR.

EVAPOHATING APPARATUS.

APPLICATION FILED MAY 10, ms.

/&

Patented July 8 2 SHEETSSHEET 2.

I-IZEIIIII a I 4 VJ,

, UNITED STATES PATENT OFFICE.

BURT E. TAYLOR, OF MOUNT VERNON, NEW YORK, ASSIGNOR- TO BORDENS CON- DENSED MILK COMPANY OF NEW YORK, N. Y., A CORPORATION OF JERSEY.

Specification of Letters Patent.

EVAPOBATING APPARATUS.

Patented July 8, 1919.

Application filed May 10, 1918. Serial No. 233,746.

To all whom it may concern:

Be it known that I, BURT E. TAYLOR, a citizenof the United States, and a resident of Mount Vernn,,county of Westchester, and State of New York, have invented certain new and useful Improvements in Evaporating Apparatus, of which the following is a specification.

My present invention relates to apparatus used 1n ald of evaporating, or otherwise a treating in order to concentrate them, liquids containlng solids in suspension, for example milk, and more particularly to those types of such apparatus disclosed in Letters Patent No. 552455 to Thiesen, or No. 878997 to Payne, and which comprise a cylindrical temperature-transmitting drum, or container, Within which there is, by aid of centrifugal force, or otherwise, imparted to the liquid the form of a continuous, continuously moving, thin film, or sheet, bearing against the temperature-transmitting interior surface of the drum. Experience has demonstrated, particularly in the milk and kindred fields, the importance, in analogously employed apparatus, of instrumentalities capable of, during evaporation, at frequently repeated intervals, yieldingly wiping from the thus functioning surface thereto adhering thickening portions of the liquid, as per the process disclosed and claimed in Letters Patent No. 1221024 to Campbell.

The objects of my present invention comprise provision of novel means whereby, during operation, such wiping of the interior temperature-transmitting surfaces of such drums can be more effectively and economically effected, and with less injury to the liquid, as wellas to the evaporated, or concentrated, final products, including particularly such of these as are. composed of, or contain, substances which, as in milk, are peculiarly susceptible to injury from undue heating, percussion, compression, or bacterial infection.

, I attain my objects by aid of the devices view of the drum and some ,of its accessories, taken on the line A-A of Fig. 2, and including also-a perspective view of some elements, including the shaft, the wipers and the train of elements connecting them;

Fig. 2 is a sectional view taken on the line BB of Fig. 1 and viewed in the direction of the arrow;

Fig. 3 is, on enlarged scale, a fragmentary end view showing one of the body, and one of the end Wipers, and also the shaft in section, and the said train of connecting elements;

Fig. 4 is a. rear view of the parts shown in Fig. 3, except the end wiper, and seen in the direction of the arrow at of Fig. 3;

Fig. 5 is, on enlarged scale, a plan view of one end of the wiper-carrying bar, and showing particularly one of the end wipers;

Fig. 6 is, on similar scale, a partly sectional view of the parts shown in Fig. 5, but taken on the line CC of Fig. 3, and Viewed in the direction of the arrow;

Fig. 7 is, on a still more enlarged scale,

a fragmentary, partly perspective and partly sectional, view of a portion of one of the end wipers, and of elements co'ntributing to its support; and

Fig. 8 1s a similar view of a part of the wiper-carrying bar, including parts contribu'ting to the support of the end wiper.

Similar numerals refer to similar parts throughout the several views.

sories, such as supports 9, 9, peripheral jacket 10, having a suitable inlet, 11, for

thereint0 charging, and outlet. 12 for therefrom discharging, temperature-affecting media such as steam, etc.; alsoan inlet pipe 13 provided with a valve 13 for regulatedly charging into the drum the liquid to be treated and an outlet pipe 14, provided with a valve 14 for regulatedly discharging they transferring material, preferably copper,

and the drum is, in this instance, stationary during operation. In one end of the drum, I provide a therewith concentric opening 17 for access to the interior for cleansing and other purposes, and for removal there-- through, for like purposes, of the wiping and film creating instrumentalities carried by the shaft, as hereinafter described. The opening, 17 is closed, during operation, by a circular head plate, 18, detachably secured to the end wall of the drum in any convenient manner, such, for example, as by the screws 18*. The head plate carries a journal bearing, 18", in which rotates one end of the shaft, 16, which is also rotatably carried in another journal bearing, 19, supported by the bracket, 19*, carried by the opposite end of the drum.

The shaft, 16, serves to rotate Within the drum the hereinafter described wiper and film-creating instrumental-ities, by aid, in this instance, of a train of connecting elements, as follows: 20 is a hub concentric with the shaft and removably secured therein parallelism with theshaft, 16.

to by aid of a usual slot and key 2-1, connection. The hub carries a plurality (in this instance four) of therefrom radially projecting, equally-spaced-apart, spokes, 22, 22 22, 22. Each spoke comprises, proximate its outer extremity, a tubular bearing,

23', adapted for receptionand rotatable carriage therein of a bolt, 24, having, at one end thereof, a head, 24 and near the opposite end a perforation, 24 for reception of a cotter pin, 24, on withdrawal of which the bolt is removable from the bearing. A rlgid angle-bar, composed of the unitary, mutually angularly disposed, flanges, 25, 25 constitutes another unit of each of the trains of elements connecting each rank of wipers with the shaft, as hereinafter described.- This bar extends longitudinally through nearly the entire length of the drum The flange, 25*, carries removably thereto secured, as by a screw bolt, 27, (Fig. 3), an oscillatable lever, 27, medially of which is a journal opening through which passes roe tatably the bolt, 24. The flange, 25 of the bar also carries an arm, 26, secured thereto the same as the lever arm, 27, containing near its extremity a j ourual opening through r which likewise passes, rotatably therein, the bolt, 24. The bar is thus oscillatably carried by the spoke, 22, which also carries a pair of mutually parallel and oppositely disposed studs, 28, 2-9, the outer ends of which contain, opposite each other, screwthreaded openings for the reception of the coacting set-screws, 30, 31, alined to bear cooperatively on opposite sides of the upper arm of the lever and whereby the angular disposition thereof relatively to the shaft and to the interior body surfaces of the drum is positively adjustableand maintainable and the tension imparted to the wipers controlled, as hereinafter described.

The bar flange, 25, contains a plurality of equally-space'd-apart alike recesses, 25-", each for reception therein of one of a numerous plurality (disposed in a single rank pproximately coextensive longitudinally iivith the bar) of like spaced-apart, therefrom projecting springfunction ing members or fingers, 32, 32, in this instance and each being a leaf of resilient steel, each remov- "ably held in its respective recess by any consurface, toward the interior body surface of the drum, the taper, or resultant of the angle being preferably directed approximately in the direction of the grain of the wood. The proportions and dispositions of the parts are such that the apices of said edges of the wiper blocks, in a single rank normally contact, in parallelism, with, the interior body surface of the drum, and that substantially interspaces are left open between the blocks, including their operative wiper edges. It should also be noted that the blocks and their said interspaces in any one rank are preferably staggered relatively to those in the next following, orpreceding, rank, this being in order that portions of the surface left, by one rank, unwiped, because of the interspaces, may be wiped over by the blocks of the next following rank. Such relatively staggered disposition of the parts seems unnecessary to be specifically shown, as is difiicult in the drawings of the present construction; It is readily attained by varying the widths of one or more of the blocks in the one rank as compared with those of others.

' It will be understood that, with the above exception, all the wipers addressed to the cylindrical interior body surface of the drum are substantially alike, and that each rank thereof is similarly connected, by exactly, or substantially, similar trains of elements, with the shaft.

It is of. importance that, as shown in the drawings, the disposition of the leaf springs,

springs, 32, of each rank, and thus the des1red degree of pressure of the operative edges of the wiper blocks against the surface of the drum. Also by aid of the setscrews the pressure-of the wipers upon the surface is quite accurately regulatable, and thereafter positively maintainable; the individual leaf springs thus Provided for each block, and the conformation, and composition, of the wiper edges supplying all required yield and resilience, and this independently and variously to each wiper respectively, according to constantly changing conditions of its own work as compared to that of others of its rank. 1

The set-screws also enable the operator to positively adjust and maintain the angle of the wiper edges relatively to the thereby affected surface in such fashion as to insure their being yieldingl drawn, or dragged, thereover through t e liquid, as dlstinguished from their being pushed, or shoved, against it and the liquid being thereby as it were, shoveled away; the result being that v delicate constituents of the liquid, for example butter fat globules in milk, are exempted from compressions, or impacts, tending to undesirably dlsrupt them.

For its most successful and sanitary op-' eration, the a paratus depends upon instrumentalities a apted to wlpe simultaneously the portions of the interior end surfaces of .the drums contacted by the centrifugally actuated cylindrical film of the liquid under treatment, and which are not swept by the side wipers described, this being particularly so in concentrating milk. I accordingly provide a pair of spring-tensioned end-wiper blocks, 34, 34, carried by each of the above described angle bars, in advance of the side wipers. These end wiper-blocks are preferably of the same material as the side-wiper blocks, and are supported and actuated as follows. The flange, 25*, of each angle bar is cut away adjacent each extremity thereof, as shown in Fi 5, thus affording space for installation, t ere, of the endwiper and its supports. To the flange, 25, there is secured, as per bolts, 35, (Figs. 5 and 8), one flange, 36, of an angle-bar to the other flange, 36, of which there are bolted the jaws, 37, within which is slidably disposed a carrier member, or movable inner-jaw, 38, within which is, in turn, slidably supported one of the end-wiper blocks, 34, composed, preferably, of material similar to that of the side wiper blocks, and analogously tapered so as to present a longitudinally extended, transversely angular, operative edge to the interior end surface of the drum, as indicated in Figs. 5 and 6, and see also Fig. 7. It will be noted that the end blocks are located in almost contacting proximity to, without actually touching, the cylindrical interior body surface of the drum, and that the wipe the end surfaces very briefly antece ently of the wi in of the sides by the other blocks, 33. ee Fig. 3). Correspondingly, the two terminal units of each rank of side wiper blocks, 33, do al-' most, but not quite, contact with the interior end surfaces of the drum. Though this construction leaves the extreme corner between the two surfaces literally unwiped, the violent motions im arted to the liquid therewith in contact y the passage in such close proximity thereto of the one wiper followed, at such a brief interval, by another, operating, in a difierent lane, sufiice, usually, to wash away any in urious adhesions of the liquid, or its constituents, to the said literally unwiped, and almost negligibly small, surfaces.

The end blocks, 34, aremovably and remov ably supported in their aforesaid disposition, and constantly yieldingly forced to their operative contact with the interior end surfaces of the drum as follows: A reciprocatable spindle, 39, (Figs. 5, 6, and 7), ex-

tends slidably through an opening therefor in the rear of the jaws, 37, and of the carrier, 38, being also further supported slidably by extending through a suitable opening in the stud, 40, carried by the flange, 36, A pin, 41, is removably carried by the spindle which is threaded through an expansile helical spring, 42, the extremities of which bear respectively against said pin and stud. The spindle is provided with a T head, 43. In the rear of the block, 34, is countersunk a recess. 34, adapted to receive the T head and thus prevent lateral movement of the block within the carrier, 38. The T head also bears against the block in the direction of the'end surface, 8", the length of the block being such as to afford a slight clearance, or s ace, 44, (Fig. 6) to accommodate recoil.

ne end of the T head, 43, is guided and slidably supported by passing through a Slot, 45, in the aws, 37. The construction is such the block'is constantliyiyielding'ly spring-impelled toward the en otherwise, jamin'the' carrier, then inthat case both block and carrier are together so impelled, oneqobject" of the carrier being to I safeguardagainst such jamming.

cleans ng, which is particularly important whenmllkis beingtreated. f To Withdraw and sufliciently separate the aforesaid de-j "vices operating within the drum, it. is only necessary to remove the head, '18, and turn theset screws, 30, 31,, so jas to bring the ex- Y 'ternal-v periphery 'ofthe fourgroups of wipers1nt0 a circle sufficientlysmallto en able them together with the'hub,f20,. and

heated, asl-may be indicated, 'evaporat1on' follows"correspondingly, 'and the "liquid; evaporated"to .the.. degreedesired, finallypasses'out, of the drum through .the 0-11tlet,'. 114, to-be thereafter marketed ,-or further,- treated, as may; be. desired-, [The operation Y thus becontinuousl-y carried on; or in -,te rmittently, as desirg'edl Th'eblo'cks serveto j constantly and immediately remove from immediate contact with the operative ,"surfacescfthe drumalltheretomost proximate;

'- thereby unduly heated, thickened,landtheregz "tofunduly adhesive, portions of the liquid,

' their respective trainsjof connecting mem-'- 'bers to be pulled along and" (iii of the shaft,

16, through the'opening,,17;."' A fter which, by withdrawing the cotter; pins, 24 and the" bolts, 24, the thereby connected I vfurther separableI-and-so on inde nitely as end blocks,-3 t,' and their spring tensions and f I II other accessories, these also are readily sepa- I rable', after their withdrawalfrom; the drum, asabove described; by lmerely pulling';.the fl blocks out, of their carriers, 38, iiv thdrawing .the pins, 41, withdrawingthe. spindles,' 39.,

perthe construction-described. As to the and thereafter the carriers, 38, etc. j Operation and e;fect s.'+-The liquid to be against and -throughtheiliquidrto the :body. "of which is thus. communicated both rotary and horizontallyprogressive movements, the centrifugal" tendency .of: which; assist I spreading and maintaining; the "liquid in the formof fla continuous, continuously moving, f attenuated film bearing-against thet'interior 1 temperature-transmitting' surface of-the' drum- This-surface being, for. example,

treated,- for example milk to be evaporated or pasteurized, etc., is fed,.or' allowedto floW.,-'. into the :drumfthrough the inlet, 13, and, -.co ntrolledbyjthe valve, 13am sucli. quan-if I I v I banking upof the liquIdf'in-f front of the 1 Wipers is diminished, and. -there is" insured tity andat such. rates as-may. beindicated.

I 'Rapid. rotation of the shaft correspondingly; moves the blocks, causingthem to 'wipe the interior surface of the drum andto sweep thus promoting homogeneity, and exp'e'di'tinj'g uniformity of heat tifansference through-1 I surface, or should the block. by reason of 'swellin'gs, or

1 1 drum.

out. the mass, 5' and also preventing localized ucts. v

Amongthe importan'tfeatures andresults 7 0 .of the invention are the following, viz: 1

f(l.)' Connectionof the shaft W'ith'ea-ch'of the Wiper-blocks respectively ,by. aid of an.

independent element WhlCh isintegrally' a."

spring and theifree terminal of-Whic'hcarr ies, as's'hown, the block, wherebysimplicity of construction, cleansibility of artsand regulation and maintenance of required ten-' sion are enhanced,:and the blocks enabled to act independently of each other t'o the extent, 'of reaching thereto independently]presented deformed portions of the surface of the v Construction of-the blocks, so car-" ried, from organic material, preferably hard. 35.

Wood, and impartation thereto of a longitu- 1 dinally' extended operative wiper; edge pro-- I duced, asregard's wooden b1ocks,' by taper.- I

ing-theni to such edge in the" direction of:the f grain of the Wood, 'Whereby'not only is ac- 90. I ,iquisition by the Wiper of'un'desirablyhigh 'temperatures"safe-guarded, but, also, its in- 'fte'gral I yield and resilience are augmented and undesirable Wear and abrasions" of the drum and ruptures of constituents" of'-the 5 if liquid,-such"asbutter fat globules, etc., of 1 I I milk, by percussion or compression between.

.the'drum=andthe-wiper areininiI-nized.

' (3.) Provisionofthe interspaces between; the units ofgeach rank of Wipers sufii'cient'to permit free passage therethrough :ofa sub- I stantial portion of the liquid, whereby undue more :rapid "and complete return of wi edup portions-to the remainder of the liquid I a :and with; mimum-impairment of desired I 1 uniformity of in the filmor sheet I tl lereof. j H I 1 (4;) Staggereddisposition of the units-oi E ch rank-of wiper-blocks and their inter spaces relatively to thoseof' the next. fo1lo ing rank, wher'e'by streaks of; the heatstrans' ferring surface of the drumleft unwiped by n a vvipedby the blocksofthe-next' rank in the j 1 the interspaceslin onefrank', are; in-turn';

sequence'of rotation-and desirable trans verselcircu'lation of the liquid*augnqented, F

(5.) -Provision means,- the. the oppo I sitely disposed set-screws, cooperating upon 20 oppositesides ofan oscillatable member, 111?.-

jthetrain' ef elements. connecting the-[shaft] I With the wiper-blocks,whereby'the-pressure of the latter-uponthe surface of the drum,

and, correspondingly, the aggregate-tension: of the group offspring-elements in said train ositively .regulatableand .-.maintai-nable'.

ment relatively to the drum, whereby their cleansing and their removal, take, down, and re-assemblage, is facilitated.

(7.) The combination with each ranl of wiper-blocks of therewith carried sprlngtensioned end-wipers, operating in advance thereof, vand addressed to the interior endsurfaces of the drum, whereby is insured timely removal of the liquid, or contents thereof, from thereto unduly proximate and heated portions of such end surfaces.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is the following, viz: V

1. In an evaporating apparatus, a cylindrical container or drum, havin its central axis substantially horizontally dlsposed and v a therewith concentric, longitudinally coextensive, continuous, impervlous, circular interior body surface; a rotatory shaft concentric with said axis; supported movably in an orbit concentric with and intermediate said axis and surface. a therewith parallel member, or bar, approximately coextensive longitudinally with said surface; carried by said bar a therewith approximately coextensive rank of numerous therefrom toward-said-surface-proj ecting spacedapart spring-tensioned fingers each vibratable independently of the others and each comprising a thereby detachably carried tip of organic, material disposed tov normally contact with said surface; and means operatively connecting said bar with said shaft.

2. In an evaporating apparatus, a cylindrical container, or drum, havin its central axis substantially horizontally isposed and a therewith concentric, longitudinally coextensive, continuous, impervious, circular interior body surface; a rotatory shaft concentric with said axis; supported movably in an orbit concentric with and intermediate said axis and surface a therewith parallel member, or bar, approximately coextensive longitudinally with said surface; carried by said bar a therewith approximately coextensive rank of numerous therefrom towardsaid-surface-projecting spaced-apart, springtensioned fingers, each vibratable independently of the others and each comprising a thereby detachably carried tip of organic material disposed to normally contact with said surface; and means operatively connecting said bar .with said shaft, said means comprising a spoke carried by said shaft and carried by said spoke an oscillatable lever and a thereon-bearing adjusting set screw.

3. In an evaporating apparatus, a cylindrical container, or drum, having its central axis substantially horizontally disposed and a therewith concentric, longitudmally coextensive, continuous, impervious, circular interior body surface; a rotatory shaft concentric with said axis; supported movably material disposed to normally contact with said surface; and means operatively connecting said bar with said shaft.

4. In an evaporating apparatus, a cylindrical container, or drum, having its central axis substantially horizontally disposed and a therewith concentric, longitudinally coextensive, continuous, impervious, circular interior body surface; a rotatory shaft concentric with said axis; supported movably in' an orbit concentric with and intermediate said axis and-surface a therewith parallel member, or bar, approximately coextensive longitudinally with said surface; carried by said bar a therewith approximately coextensive rank of numerous therefrom toward-said-surface-projectin spaced apart spring-tensioned fingers, eaci vibratable independently of the others and each comprising a thereby detachably carried tip of organic material disposed to normally contact with, and be yieldingly dragged over, said surface; and means operatively connecting said bar with said shaft.

5. In an evaporating apparatus; a cylindrical container, or drum, havin its central axis substantially horizontally dlsposed and a therewith concentric, longitudinally c0- extensive, continuous, impervious, circular interior body surface; a rotatory shaft concentric with said axis; supported movably in an orbit concentric with and intermediate said axis and surface, a therewith parallel member, or bar, approximately coextensive longitudinally with said surface; carried by said bar a therewith approximately coextensive rank of numerous therefrom towardsaid-surface-projecting spaced-apart springtensioned fingers, each vibratable independently of the others and each comprising a thereby detachably carried tip of wood having an angular longitudinally extended straight edge, the apex of which is disposed to contact, in parallelism with, said surface; and means operatively connecting said bar with said shaft.

6. In an evaporating apparatus; a cylindrical container or drum, having its central axis substantially horizontally disposed and a therewith concentric, longitudinally coextensive, continuous, impervious, circular interior body surface; a rotatory shaft concentric with said axis; supported movably in an orbit concentric with and intermediate said axis and surface a therewith parallel member, or bar, approximately coextensive longitudinally with said surface; carried by said bar a therewith approximately coextensive rank of numerous therefrom toward said-surface-projecting spaced-apart spring-tensioned fingers, each vibratable independently of the others and each comprising a thereby detachably carried tip of Wood having a tapered, in the direction of the grain, longitudinally extended straight edge, the apex of which is disposed to contact, in parallelism with, said surface.

7. In an evaporating apparatus, a container, or drum, having a cylindrical, interior surface; within said drum a therewith concentric, rotary, shaft; means to rotate said shaft; a rank of spaced-apart blocks of organic material normally contacting with said surface; means to operatively connect said blocks with said shaft and impel them yieldingly and resiliently toward said contact throughout rotation of the shaft, the saidlast mentioned means comprising a plurality of interposed springs each carrying one of said blocks; and a pair of coacting, oppositely disposed, set-screws by aid of which the degree of yielding pressure of said blocks against said surfaceis adjustable and more positively maintainable.

8. In an evaporating apparatus, a container, or drum, having a cylindrical interior surface; within said drum a therewith concentric, rotatory; shaft; means to rotate said shaft; a plurality of spacedapart ranks of spaced-apart blocks composed of organic material normally in con tact with said surface, the blocks and their interspaces of the one rank being staggered relatively to those of another rank; and means to yieldingly and resiliently operatively connect each rank of said blocks with said shaft, the said last mentioned means comprising interposed springs, each carrying one of said blocks.

9.,In an evaporating apparatus, a container, or drum, having a cylindrical interior surface; within said drum a therewith concentric, rotatory shaft; means to rotate said shaft; a plurality of spaced-apart ranks of spacedapart blocks composed of organic material normally in contact with said surface, the blocks and their interspaces of the one rank being staggered relatively to those of another rank;-and means to adjustably yieldingly and resiliently operatively connect each rank of said blocks with said shaft.

10. In an evaporating apparatus, a container, or drum, having a cylindrical interior body surface, and a thereto angularly disposed interior end surface; within said drum a therewith concentric rotatory shaft; means to rotate said shaft; a movable block composed of organic material normally contacting with said body surface in almost 1,sos,s19

contacting proximity to the corner between it and said end surface; another such block normally contacting with said end surface and also in almost contacting proximity to said'corner; means operatively connecting said shaft with said blocks so spaced apart that, during rotation of the shaft, the block contacting with said end surface shall wipe it briefly antecedently of the wiping of the body surface by the other block.

11. In an evaporating 'apparatus, a cylinwith said shaft and impel them yieldingly andresiliently toward said contact throughout their entire rotation by the shaft.

12. In an evaporating apparatus, a cylin drical container, or drum, having concentric with its central longitudinal axis an interior concave surface and thereto angularly disposed interior end surfaces; within said drum a therewith concentric rotatory shaft; means to rotate said shaft; a reciprocatable block normally contacting with one of said end surfaces, and means to operatively connect said block with said shaft and constantly, yieldingly impel it toward said end surface during rotation of'the shaft.

.13. In an evaporating apparatus, a cylindrical container, or drum, having concentric with its central longitudinal axis an interior concave surface and thereto angularly disposed interior end surfaces; within said drum a therewith concentric rotatory shaft; means to rotate said shaft; a reciprocatable block of organic material normally contacting with one of said end surfaces, and means to operatively connect said block with said shaft and constantly, yieldingly impel it toward said end surface during rotation 'of the shaft. v

-14. In an evaporating apparatus, acylindrical container, or drum, having concentric with its central longitudinal axis an interior concave surface and thereto angularly disposed interior end surfaces; within said drum a therewith concentric rotatory shaft; means to rotate said shaft; a reciprocatable block normally contacting with one of said end surfaces; means to operatively connect said block with said shaft and constantly, yieldingly impel it toward said end surface during rotation of the shaft; the said last mentioned means comprising a bar operatively connected With the shaft; a jaw carnected so as to constantly, yieldingly force ried by said bar; a reciprocatable carrier said member against the block and toward slidably carried by said jaw and dimensaid end surfaces.

sioned to therein normally slidably carry BURT E. TAYLOR. 5 said block; a reciprocatable member dis- Witnesses:

posed to, Within said carrier, bear against N. A. OLTMANN,

the block; and a spring disposed and con- D. HAROLD BUSH. 

